Lower Bounds on Approximation Errors to Numerical Solutions of Dynamic Economic Models

We propose a novel methodology for evaluating the accuracy of numerical solutions to dynamic economic models. It consists in constructing a lower bound on the size of approximation errors. A small lower bound on errors is a necessary condition for accuracy: If a lower error bound is unacceptably large, then the actual approximation errors are even larger, and hence, the approximation is inaccurate. Our lower‐bound error analysis is complementary to the conventional upper‐error (worst‐case) bound analysis, which provides a sufficient condition for accuracy. As an illustration of our methodology, we assess approximation in the first‐ and second‐order perturbation solutions for two stylized models: a neoclassical growth model and a new Keynesian model. The errors are small for the former model but unacceptably large for the latter model under some empirically relevant parameterizations.     

古诗英译中“音韵美”的再现

译诗应在忠于内容的基础上,注重形式信息的传达,以尽量减少翻译过程中诗文美的流失.切不可囿于内容而轻形式,如此译文难免流于平庸,丧失了原诗的光彩和魅力.为此,本文从形式美之一的"音韵美"的角度出发,本着将这一国粹在异域文化中能够尽善尽美地展现的宗旨,结合英诗押韵的表现手法,通过分析实例,详细阐释了古诗英译过程中"音韵美"的再现问题.     

预算松弛行为的实验研究

运用实验方法研究了预算管理问题,发现信息对称和真实导向的薪酬计划对预算松弛 都有一定的抑制作用,其中信息对称性对预算松弛的影响十分显著. 通过实际财会人员和大学 生在实验中的预算行为的比较,可以看到我国国有企业预算编制的一些特殊行为.     

Heine-euler extensions of the poisson distribution

The paper shows that the Heine and Euler distributions (Benkherouf and Bather, 1988) are members of a family of q-series anologues of the Poisson distribution, with similar probability mass functions, but different restrictions on their parameters, and different modes of genesis and properties. The relationships between the Heine, Euler, pseudo-Euler, Poisson and geometric distributions are explored. Illustrative data sets are discussed.     

Use of ranks in probability propoetional to size sampling

Use of ranks in unequal probability sampling is examined for sample selection, stratification as well as determining the strata boundaries. A few sampling schemes are proposed and investigated, For samples of size two, two sampling schemes and their 1PPS versions are discussed, An extension of these schemes to general sample sizes is outlined. Nonnegative unbiased variance estimators are proposed in each case, An empirical comparison is included.     

The Design of Scoring Schemes for Surveys Using the Block Total Response Method

ABSTRACT

In this article we investigate the design of scoring schemes for surveys using the block total response method. This method was first proposed by Raghavarao and Federer (1979 Raghavarao , D. , Federer , W. T. ( 1979 ). Block total response as an alternative to the randomized response method in surveys . J. Roy. Statist. Soc. 41 ( 1 ): 40 – 45 . [CSA] [CROSSREF]  [Google Scholar]) to provide accurate estimates of the base rates of sensitive characteristics using balanced incomplete block designs. The scoring scheme used in Raghavarao and Federer (1979 Raghavarao , D. , Federer , W. T. ( 1979 ). Block total response as an alternative to the randomized response method in surveys . J. Roy. Statist. Soc. 41 ( 1 ): 40 – 45 . [CSA] [CROSSREF]  [Google Scholar]) did not guarantee anonymity of answers and so the possibility of improving on this basic scoring scheme is considered in this article.     

Bayes Estimation Based on Joint Progressive Type II Censored Data Under LINEX Loss Function

In the lifetime experiments, the joint censoring scheme is useful for planning comparative purposes of two identical products manufactured coming from different lines. In this article, we will confine ourselves to the data obtained by conducting a joint progressive Type II censoring scheme on the basis of the two combined samples selected from the two lines. Moreover, it is supposed that the distributions of lifetimes of the two products satisfy in a proportional hazard model. A general form for the distributions is considered, and we tackle the problem of obtaining Bayes estimates under the squared error and linear-exponential (LINEX) loss functions. As a special case, the Weibull distribution is discussed in more detail. Finally, the estimated risks of the various estimators obtained are compared using the Monte Carlo method.     

A robust test for asymptotic independence of bivariate extremes

We show that the existing tests for asymptotic independence are sensitive to outliers. A robust test is proposed. The new test is made stable under contamination through a shrinkage scheme. Simulations show that the new test performs well in the presence of contaminated data while maintaining good properties when there is no contamination. An application to real data shows the added value of our new robust approach.     

Pension scheme fees and charge ratios in 44 countries: A comparative study

Based on data received from pension supervisory authorities, the article reviews 85 different pension schemes in 44 jurisdictions by looking at fees and charges as well as their legal ceilings and their development since 2014. A key finding is the observed decrease in fees and caps. The article presents jurisdictions according to clusters, i.e. by groups of countries with identical or very similar items already covered by pension fees, and analyses the extent to which various cost and fee elements are covered by fees charged to members. Finally, we calculate charge ratios for each cluster to quantify the impact of fees and charges on pension savings. Occupational defined contribution pension schemes and personal plans linked to employment tend to be much more cost effective than personal schemes that have no direct employment link.     

Non-government organization study awards: enhancing successful completion of social work qualification

ABSTRACT

The current study used a sequential, exploratory mixed-method design to explore how a social work study scholarship implemented in Aotearoa New Zealand impacted on recipients’ qualification completion and their professional and practice competence. Phase one involved 13 individual interviews with past award recipients which described how the study award impacted on their qualification completion. Thematic analysis was used to extract themes. These themes were examined in the second phase through a quantitative battery completed by 107 past recipients to examine their professional and practice competence. The findings from interviews showed the award enabled recipients to complete their studies and improve their social work practice without causing undue stress or financial pressure on the recipient and their family. Quantitative analysis corroborated and extended these findings to demonstrate that the award contributed to lifting the level of social work knowledge, competence, and skills in the recipients. Accompanying the successful qualification completion, these qualified social workers were equipped with essential skills, promoting social work values and competence to contribute and safeguard the benefit of children, families, and communities. The awards offered a ‘wrap around’ support and was not limited by age or ethnicity but provided a support system to achieve qualification completion.